Linear motor with specific ratios of dimensions
AssigneeFuji Electric Co., Ltd.
InventorsTerukazu Akiyama, Satoshi Imamori
Life of this patent
Estimating the term…
Abstract
A linear motor includes an armature and a field magnet that are disposed to face each other and configured to be subjected to relative movement. The armature includes a plurality of windings that are arranged along a direction of the relative movement. Each of the windings is wound around a first iron core. The field magnet includes a plurality of permanent magnets that are disposed to face both sides of the armature in a direction perpendicular to the direction of the relative movement, and are arranged along the direction of the relative movement. A ratio of a dimension of the first iron core to an arrangement pitch of the windings in the direction of the relative movement is in a range from 0.1 to 0.35.
Claims11
A linear motor comprising:
- an armature and a field magnet that are disposed to face each other and configured to be subjected to relative movement,
- wherein the armature includes a plurality of windings that are arranged along a direction of the relative movement, each of the windings being wound around a first iron core,
- wherein the field magnet includes a plurality of permanent magnets that are disposed to face both sides of the armature in a direction perpendicular to the direction of the relative movement, and are arranged along the direction of the relative movement, wherein S poles and N poles of the plurality of permanent magnets are respectively arranged along the direction perpendicular to the direction of the relative movement,
- wherein a ratio of a dimension of the first iron core to an arrangement pitch of the windings in the direction of the relative movement is in a range from 0.1 to 0.35,
- wherein the first iron core has a central portion and end portions respectively positioned on two sides of the central portion along the direction perpendicular to the relative movement, wherein each of a cross-sectional shape of the end portions has an area normal to the direction perpendicular to the relative movement greater than a cross-sectional area of the central portion normal to the direction perpendicular to the relative movement, and
- wherein a width of the central portion along the direction of the relative movement is uniform.
A linear motor comprising:
- an armature and a field magnet that are disposed to face each other and configured to be subjected to relative movement,
- wherein the armature includes a plurality of windings that are arranged along a direction of the relative movement, each of the windings being wound around a first iron core,
- wherein the field magnet includes a plurality of permanent magnets that are disposed to face both sides of the armature in a direction perpendicular to the direction of the relative movement, and are arranged along the direction of the relative movement, wherein S poles and N poles of the plurality of permanent magnets are respectively arranged along the direction perpendicular to the direction of the relative movement,
- wherein a ratio of a dimension of the armature to a dimension of the linear motor in a direction in which the armature and the field magnet face each other is in a range from 0.47 to 0.61,
- wherein the first iron core has a central portion and end portions respectively positioned on two sides of the central portion along the direction perpendicular to the relative movement, wherein each of a cross-sectional shape of the end portions has an area normal to the direction perpendicular to the relative movement greater than a cross-sectional area of the central portion normal to the direction perpendicular to the relative movement, and
- wherein a width of the central portion along the direction of the relative movement is uniform.
Dependencies are inferred from the claim text.